I didn’t know the rendering was done server-side, but if that saves time then that’s a plus of course.
I don’t agree about installation at all, with mac app store (and probably on the PC as well) installation is a one-click affair.
As to tutorials, I don’t see how the choice of platform would make it any easier to use, how do you mean?
Oh, and my point was that These points don’t really seem to be arguments for a browser app.
I would think that this makes most sense for casual video editing. If you can be bothered paying for a subscription you might as well get adobe or some other established, native app. Installation is trivial.